It varies for every exam, Tim. For example, I might have gotten 4 questions on garbage collection and you might get only 2. Although you can expect at least one question from each section, it's not possible to say how many you'll get from each section. Corey

Mr.Corey was right, but let me tell my experience in the exam, i got more questions on threads and wrapper classes than other topics, especially questions on threads were hard so do study well. All the best.